First you need a rail riser:
https://www.amazon.com/dp/B07L2HPBND?ref=ppx_yo2ov_dt_b_product_details&th=1
And also a scope ring adapter with rail
https://www.amazon.com/dp/B0CQLRVJDC?ref=ppx_yo2ov_dt_b_product_details&th=1
Bolt this onto your HW44, then ad your favorite AR buffer tube and...