Testing magazines in an AR-15 M4 Clone - Anderson upper and lower, 14 1/2" DPMS Government Contract Barrel with a pinned and welded GSL Technologies suppressor adapter. Osprey Defense Gas Piston System. Mostly Anderson and Palmetto milspec parts with GG&G sling mounts. Yes, it's a parade sling...very inexpensive!

March 3, 2019 - My Dad welds over the hole and pin that permanently attaches the GSL Technology, Inc. QD Muzzle Device to the M4gery 14 1/2" barrel - making it over 16" length.