General Info: Lower Parts Kits include all of the small bits & pieces needed to make your AR-15 Lower fully functional. Such as the mag release, take-down pins, selector, trigger guard, bolt catch, buffer retainer, roll-pins, detents, and small springs are included to allow completion. 'Mil-Spec' fire control group kits include stronger springs meant to ignite hardened primers found on M855 (Green Tip), XM193, and other military 5.56x45mm loads.
Brand: The Mil-Spec Lower Parts Kit is produced by Kak Industries with high-quality steel & brass components.
Brand Info: .
Platform: Mil-Spec AR-15
FCG Included: The Mil-Spec Recoil Technologies kit comes with a Mil-Spec Fire Control Group to ensure reliable operation and ignition of hardened rifle primers.
Grip: The Mil-Spec lower parts kit includes an A2 style grip and grip screw to complete your AR-15 lower receiver.
Weight: The overall weight of the KAK Mil-Spec Lower Parts Kit is 0.505lbs.
Made in the USA
Black A2 Pistol Grip
Pistol Grip Screw
Pistol Grip Lock Washer
Trigger Guard Roll Pin
Bolt Catch Spring
Bolt Catch Roll Pin
Magazine Catch Button
Magazine Catch Spring
Front Pivot Pin
Pivot Pin Detent Spring
Take Down Detent
Buffer Retainer Pin
Buffer Retainer Spring
Brand: KAK Industry
Model: Mil-Spec Lower Parts Kit
Includes Fire Control Group: Yes
Includes Grip: Yes
Grip Model/Style: Mil-Spec A2 Grip
Grip Color: Black
Full Auto Compatible: No
Restricted States: No
Weight: .505 Lbs
Note: Trigger Guard Type/Style May Vary (ie: Mil-Spec and/or Enhanced)
IDL Industries 9MM BCG
An AR-15 9mm bolt carrier group is the critical piece of a pistol caliber upper receiver that houses many important parts such as the firing pin, pistol gas key, cam pin, extractor, and bolt. With all these pieces working together the BCG can grab and feed another round out of a detachable magazine, chambers, and is ready to fire and extract a spent cartridge. During the extraction of a cartridge, the BCG works to absorb the force of the explosion by expanding gas in the carrier. During this process, the gas pushes the spent cartridge rearward with enough inertial force to send the Bolt Carrier Group back into the buffer tube which helps to minimize the recoil of your gun when firing and the cycle will repeat for subsequent shots. For 9mm bolt carriers, the bolt head is flat and is critical in creating a seal on the blow-back design of AR-15 9mm Pistol Caliber Carbines.
About this BCG: This BCG is an AR-15 compatible design, allowing use with 9mm Luger (9x19) cartridges. The 9mm AR-15 bolt carrier is also machined from 8620 Alloy Steel and is completed with a Nitride finish. This BCG comes with the ability to be full-auto compatible and also features forward assist notches. MPI testing has also been done to ensure that there are no structural flaws to this BCG.
Caliber Compatibility: 9mm Luger (9x19) - This BCG is designed for the 9mm caliber. The most common pistol cartridge in the United States.
Finish: Nitride - Nitriding is a process during manufacturing that diffuses nitrogen into the steel to make a case-hardened surface for improved resistance and strength. A Nitrided BCG typically has a gloss black texture. Nitrided Bolt Carriers have increased resistance from heat, and corrosion.
Material: 8620 Alloy Steel - Body - 8620 Steel is a carburized alloy steel meaning carbon was added to increase hardness of the steel. 8620 is known for its high case toughness and high core toughness. Made mostly of nickel concentrate, this steel can easily withstand the firing stress of the BCG under operation.
Forward Assist Notches: This BCG comes with forward assist notches which allow the forward assist on the upper to contact the BCG pushing it forward and locking the bolt into place. These forward assist notches can also help clear malfunctions in a speedy manner when the BCG becomes jammed.
Gas System: Direct Blow Black - Pistol Caliber Carbine AR-15 rifles do not tap off gas from the barrel and work in a direct blowback configuration, therefore the gas key is installed to index alongside the charging handle to allow manual operation of the platform.
Brand: Mercury Precision
Caliber Compatibility: 9mm Luger
Body Material: 416 Stainless Steel
Body Finish: Nitride
Style: Pistol Caliber
Gas System: Pistol Caliber Gas Key
Forward Assist Cuts: No
Full Auto Compatible: Yes
Machined from aluminum 7075 T6 forgings
Complete assembly including latch
Finished in Type III Hardcoat Anodized and Teflon Coated final finish for smoother operation
Includes Omega Mfg. Standard Mil-Spec Buffer Tube Kit 9MM (5.4oz Buffer)