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Since owning and shooting the Western Bushpig I have noticed that maintaining a consistently comfortable cheek weld is difficult. A large part of the reason for this is because where I rest my face on the butt stock is flat with no cheek comb. The Bushpig comes with an AR-15 styled Fab Defense GL-Core adjustable butt stock. The stock features a push-button length of pull (LOP) adjustment, a pair of QD cups for a sling, and an angled rubber butt pad that has the stock’s model name molded into the vertical rear edge of the pad.
Due to my discomfort I was ready to replace the butt stock with something with an adjustable cheek riser (comb). The Magpul PRS or Lite models came to mind. In my search for stocks I came across the Fab Defense GL-Core CP. I looked up the specs on the GL-Core CP and it looked attractive. At approx $60, it was definitely affordable compared to the Magpul options.
www.opticsplanet.com
The Magpul PRS Gen 3 retails for about $250 and was on sale for about $210. It’s also substantially heavier. The PRS Lite retails for around $92 - $120.
Next I looked up video reviews on the GL-Core CP. in the videos I noticed that the GL Core stock looked a lot like my existing stock.
GL-Core Assembly Instruction Video
I found myself walking back and forth into the room where my Bushpig was to compare images. When I examined the rubber butt pad is when I found the name of the stock model. In one of the videos a man demonstrates how to install the cheek piece or “CP.” That’s when it hit me, “I don’t need a new stock.” Thats how I was prompted to look up the cheek piece as a stand-alone part. I found it for around $17 at Optics Planet. So I ordered the piece linked below.
www.opticsplanet.com
When it arrived I followed the video instructions on how to install the CP on the GL-Core.
I also photographed most of the installation process for others who learn better from photos or have an easier time following photos and written instructions. Below is the CP (cheek piece) by itself. It comes with the Allen wrench seen in the photos and is packaged in a simply ziplock plastic pouch.
1) First remove the Fab Defense GL-Core butt stock from the buffer tube. To do this I fully extended the LOP. Next I lifted up the rear end of the LOP button and held it up firmly so that I could slide the butt stock off of the tube.
Lifting the tab allows you to lower a retention post (within the butt stock) that catches divots in the buffer tube. Below is a photo of the post within the stock without pressing the LOP button nor lifting it.
Here are the divots within the buffer tube. Circled in red is the last divot and the raised border area around it that the post has to clear for removal from the buffer tube.
To clear the bordering area of the buffer tube around the divots, firmly lift the rear of the LOP button. This lifting action is what lowers the retention post as demonstrated in the pic below.
Here’s the GL-Core removed from the buffer tube.
2) Next use the Allen wrench to loosen the 3 screws in the CP to prepare it for installation onto the GL-Core. To better access the screw on the right, loosen the middle screw first (the middle screw is not visible in this pic because it’s on the other/right side. When you flip it over it is very conspicuous). Then lift up the right end of the CP.
3) To install the CP onto the GL-Core, set the butt stock upright on its rubber butt pad and align the ends of the CP with the lower flared portion of the GL-Core butt stock. There are “left” and “right” labels on the sides of the CP to prevent users from installing the CP backwards. Look for the labels molded onto the sides. They are small. Another way to orient the CP for correct installation is by making sure that you place the pivot point of the adjustable cheek piece towards the rubber butt pad. The cheek piece does not lift straight up evenly. It tilts up on one end (you’ll see this later). Once oriented correctly with the rubber butt pad down, you need to firmly push the CP down, using your palm, until it slides onto the GL-Core in the direction of the arrow in the pic below.
If you can still see the grooves on the underside of the GL-Core then the CP needs to be pushed back further. This may require you to pry the ends of the CP away from the flared potion or the GL-Core while firmly pushing down on the end of the CP again using your palm and maybe some body weight with the butt pad positioned flat on the ground.
With no grooves visible, the CP is situated correctly.
Firmly tighten the two screws on the ends of the CP.
4) Next firmly lift the rear of the LOP tab again and push the button stock back onto the buffer tube. Do the opposite of step 1.
5) With the butt stock re-installed on the tube, now you can adjust your cheek piece height.
There are three levels of cheek piece height adjustment:
a) all the way down
b) medium height
c) maximum height
When adjusting comb/cheek piece height, I suggest that you turn you scope magnification wheel to the maximum magnification and then your adjust the stock to a LOP that you’re comfortable with to where you have optimal to acceptable eye relief. To move between the various heights, either lift up the end of the cheek piece closest to the ocular lens of your scope. Use a finger to firmly lift or push down to make adjustments. I suggest shouldering the rifle and looking through your scope with the CP adjusted to all three positions. Once you find a comfortable position, tighten the middle screw.
Now you’re ready to shoot your Bushpig more comfortably and with more consistency. If you really wish to get fancy you can add adhesive padding to your CP.
I found the middle height most comfortable upon initial installation.
Due to my discomfort I was ready to replace the butt stock with something with an adjustable cheek riser (comb). The Magpul PRS or Lite models came to mind. In my search for stocks I came across the Fab Defense GL-Core CP. I looked up the specs on the GL-Core CP and it looked attractive. At approx $60, it was definitely affordable compared to the Magpul options.
FAB Defense GL-CORE CP AR-15 Buttstock for Mil-Spec and Commercial Tubes Up to $7.35 Off w/ Free Shipping — 3 models
Shop FAB Defense GL-CORE CP AR-15 Buttstock for Mil-Spec and Commercial Tubes | Up to $7.35 Off 4.3 Star Rating on 108 Reviews for FAB Defense GL-CORE CP AR-15 Buttstock for Mil-Spec and...
The Magpul PRS Gen 3 retails for about $250 and was on sale for about $210. It’s also substantially heavier. The PRS Lite retails for around $92 - $120.
Next I looked up video reviews on the GL-Core CP. in the videos I noticed that the GL Core stock looked a lot like my existing stock.
GL-Core Assembly Instruction Video
I found myself walking back and forth into the room where my Bushpig was to compare images. When I examined the rubber butt pad is when I found the name of the stock model. In one of the videos a man demonstrates how to install the cheek piece or “CP.” That’s when it hit me, “I don’t need a new stock.” Thats how I was prompted to look up the cheek piece as a stand-alone part. I found it for around $17 at Optics Planet. So I ordered the piece linked below.
FAB Defense GCCP Cheek Riser for GL-Core Buttstock Up to $1.30 Off — 3 models
Shop FAB Defense GCCP Cheek Riser for GL-Core Buttstock | Up to $1.30 Off 4.2 Star Rating on 18 Reviews for FAB Defense GCCP Cheek Riser for GL-Core Buttstock Best Rated + Free...
When it arrived I followed the video instructions on how to install the CP on the GL-Core.
I also photographed most of the installation process for others who learn better from photos or have an easier time following photos and written instructions. Below is the CP (cheek piece) by itself. It comes with the Allen wrench seen in the photos and is packaged in a simply ziplock plastic pouch.
1) First remove the Fab Defense GL-Core butt stock from the buffer tube. To do this I fully extended the LOP. Next I lifted up the rear end of the LOP button and held it up firmly so that I could slide the butt stock off of the tube.
Lifting the tab allows you to lower a retention post (within the butt stock) that catches divots in the buffer tube. Below is a photo of the post within the stock without pressing the LOP button nor lifting it.
Here are the divots within the buffer tube. Circled in red is the last divot and the raised border area around it that the post has to clear for removal from the buffer tube.
To clear the bordering area of the buffer tube around the divots, firmly lift the rear of the LOP button. This lifting action is what lowers the retention post as demonstrated in the pic below.
Here’s the GL-Core removed from the buffer tube.
2) Next use the Allen wrench to loosen the 3 screws in the CP to prepare it for installation onto the GL-Core. To better access the screw on the right, loosen the middle screw first (the middle screw is not visible in this pic because it’s on the other/right side. When you flip it over it is very conspicuous). Then lift up the right end of the CP.
3) To install the CP onto the GL-Core, set the butt stock upright on its rubber butt pad and align the ends of the CP with the lower flared portion of the GL-Core butt stock. There are “left” and “right” labels on the sides of the CP to prevent users from installing the CP backwards. Look for the labels molded onto the sides. They are small. Another way to orient the CP for correct installation is by making sure that you place the pivot point of the adjustable cheek piece towards the rubber butt pad. The cheek piece does not lift straight up evenly. It tilts up on one end (you’ll see this later). Once oriented correctly with the rubber butt pad down, you need to firmly push the CP down, using your palm, until it slides onto the GL-Core in the direction of the arrow in the pic below.
If you can still see the grooves on the underside of the GL-Core then the CP needs to be pushed back further. This may require you to pry the ends of the CP away from the flared potion or the GL-Core while firmly pushing down on the end of the CP again using your palm and maybe some body weight with the butt pad positioned flat on the ground.
With no grooves visible, the CP is situated correctly.
Firmly tighten the two screws on the ends of the CP.
4) Next firmly lift the rear of the LOP tab again and push the button stock back onto the buffer tube. Do the opposite of step 1.
5) With the butt stock re-installed on the tube, now you can adjust your cheek piece height.
There are three levels of cheek piece height adjustment:
a) all the way down
b) medium height
c) maximum height
When adjusting comb/cheek piece height, I suggest that you turn you scope magnification wheel to the maximum magnification and then your adjust the stock to a LOP that you’re comfortable with to where you have optimal to acceptable eye relief. To move between the various heights, either lift up the end of the cheek piece closest to the ocular lens of your scope. Use a finger to firmly lift or push down to make adjustments. I suggest shouldering the rifle and looking through your scope with the CP adjusted to all three positions. Once you find a comfortable position, tighten the middle screw.
Now you’re ready to shoot your Bushpig more comfortably and with more consistency. If you really wish to get fancy you can add adhesive padding to your CP.
I found the middle height most comfortable upon initial installation.
