10" 300BLK Complete Low Profile Piston Upper with A.P. 9" M-Lok Handguard

A: All of our bcg are m14 for full auto.

A: Because our carriers are NiB we do not need to chrome line them. Here our the specs:

PISTON BOLT CARRIER SPECS:
Bolt Carrier Material, 8620
Bolt Carrier Nickel Boron Coating
Bolt body produced from AISI 9310 VAR (Vacuum Arc Remelt) and Nitrided, Extractor produced from MIL-S-5000 steel and vacuum hardened

A: Our 300BLK was designed to run optimally between super and subs without the need to adjust. Our barrels are manufactured by Shaw Barrels for us according to our specs.

A: The Law Tactical golder has a part that has to be inserted in the bolt carrier and because we use a polymer insert it makes our bolt carriers incompatible with any folders.

A: No, we designed our proprietary barrel to use exclusively with Aero Precision Enhanced Hanguards.

A: Yes these uppers have a pistol length gas system.

A: We specifically designed this particular piston system to fit with the Aero Precision Enhanced handguards using our proprietary steel piston barrel nut. Since we didn't design this piston system to fit with other handguards we are unaware of any other handguards that are compatible.

A: For our 300BLK Piston Uppers, we recommend H2 Buffer and Standard Carbine Spring. https://www.blackriflearms.com/FAQ_ep_55.html

A: Our 300BLK you can't use a side charger because we have to build our 300BLK utilizing our proprietary upper receivers which use a rocker bushing in order for one to remove the piston system due to short gas length. To see this feature please click on link: https://youtu.be/fdvbPdPm-Xw The 6.5 Grendels can use side charging upper receivers, we will be adding more Grendel uppers to the product lineup over the next couple of weeks.