Muleskinner
Ultimate Member
i just bought one of these to put on a polymer lower I milled from 80% a while back (I used it for testing and while it functions perfectly, I don't trust polymer to hold up with recoil) Looking at the reviews and videos it looks very promising. One competition shooter claims a bit over 1" groups at 450 yards. It uses a delayed blowback similar to HKs design with roller bearings riding on a trundle which keeps the bolt locked until the bullet leaves the barrel giving it bolt gun like accuracy. Should be a fun shooter
https://garrowdev.com/products/gfd-ar15-17hmr
https://garrowdev.com/products/gfd-ar15-17hmr