Gun Parts — BCGs, Lowers, Gas BlocksReplacement and upgrade parts for AR-15, AR-10, and AK platforms. Nitride and phosphate bolt carrier groups, low-profile .750 gas blocks, stripped upper and lower receivers, charging handles, buffer tubes, and springs. Everything between trigger pull and muzzle exit.Related CategoriesMagazinesBarrelsAR-15 UppersEvery firearm on this page ships direct from our Stafford, Texas facility to the transferring FFL dealer of your choice. California, New York, New Jersey, and Massachusetts-compliant configurations available on request. NFA items (suppressors, SBRs) require Form 4 processing through your transferring dealer.