Aim Sports' AR-15 Armorer's Build Kit comes with everything you need to assemble a lower receiver, install the barrel on a stripped upper for AR-15 pattern rifles, and more. This kit includes: AR upper and lower receiver vise blocks, armorer's wrench, A1/A2 front sight tool, roll pin punch tool, delta ring wrench, gas block pinning jig, red laser boresight, multi-point rifle sling, and a bag to store it all. AR upper and lower receiver vise blocks are constructed of solvent-resistant polymer for safe clamping without distorting or marring the receiver. The AR-15/M4/M16 Armorer's wrench is a durable, universal tool for M16 fixed stock and M4 collapsing stock variants of the AR-15 platform, allowing installation/removal of barrel nuts, muzzle devices, receiver extensions, and buttstocks. This 12.5" wrench fits standard gas blocks, and is made of 4140 steel with a black powder coated finish. The all-steel A1/A2 front sight tool (4 and 5 prong) is compatible with AR-15/M16, and has a black oxide finish. The 4.75" steel roll pin punch tool has an easy-to-use design equally suited for the home builder or professional gunsmith alike. The delta ring wrench is 11" long and made of steel with non-slip rubber coated handles, polymer base and endcaps. The gas block pinning jig is compatible with most gas blocks (including BCM, Rainier, VLTOR, Zero Hour). Constructed from 6061 anodized aluminum, it is 2.25" long with a wide base for stability, and a through hole allowing you drive out pins from left or right. The two-point sling has extra thick padding for added comfort when carrying heavier firearms, and all-steel mash hooks to secure your firearm in the field. The 1.25" heavy duty nylon straps are fully adjustable from 48-60" and tested to hold weight in excess of 250 lbs. The .223 Remington red laser boresighter has a 5mW, 635/655mn output and uses an LR41 battery. The utility patrol bag is constructed of durable black 900D polyester material, with an adjustable, padded shoulder strap and carry handles with reinforced stitching for added durability. It features two large exterior zipped panels with multi-sized pockets, three additional multi-sized exterior accessory pouches, two water bottle/radio pouches, a flashlight loop, adjustable main compartment divider with pockets and velcro, and an ID window.