I received my AR upper today and have a few questions. It is an A2 HBAR upper with a colt barrel stamped 5/95 and C MP 5.56 NATO 1/7 HBAR. The chamber looks chromed, but I don't know about the barrel? The rifling looked good; 1/7 is a fast looking twist. The muzzle has a 3 slot compensator that looks pinned in place. Here's a pic: Brake pic
Is the barrel threaded under the brake? The brake slots are at 9, 12, and 3 o'clock with a closed bottom. Is this comp loud? Can I just drill this pin out?
The upper has 0.25 inch diameter holes in both mounting holes. The only mark is a broken A by the rear sight. I'm guessing this is not a colt upper. Here's a pic: upper pic The bolt group and charging handle shows little wear and are unmarked. The bolt compartment in the carrier looks chromed. Here a pic: bolt group pic
The handguards are standard A2 black plastic. I'm thinking of replacing them with a Bushmaster free float tube (vented). Is there a good collector or value reason to leave the barrel as is?
Is the barrel threaded under the brake? The brake slots are at 9, 12, and 3 o'clock with a closed bottom. Is this comp loud? Can I just drill this pin out?
The upper has 0.25 inch diameter holes in both mounting holes. The only mark is a broken A by the rear sight. I'm guessing this is not a colt upper. Here's a pic: upper pic The bolt group and charging handle shows little wear and are unmarked. The bolt compartment in the carrier looks chromed. Here a pic: bolt group pic
The handguards are standard A2 black plastic. I'm thinking of replacing them with a Bushmaster free float tube (vented). Is there a good collector or value reason to leave the barrel as is?