556 / 223 / 300 Side Charging Bolt Carrier Group, Nitride QPQ
ADK Arms side charging 223/5.56 bolt carrier group is engineered and designed to the highest tolerances and military specifications and beyond. Our superior nitride QPQ finish ensures long term durability and lubrication. Each BCG features our famous MPI “bionic bolt” which has exceeded 50,000 rounds in full auto, fully suppressed testing without fail. Handles are included and are removable from both sides. ADK Arms recommends a small amount of Loctite to ensure the handles remain secure while using.
ENHANCED EXTRACTOR SPRINGS
To assure the highest degree of consistency and reliability, ADK Arms invests in premium extractor springs from Tactical Springs LLC / Sprinco USA along with a Mil-Spec Black Viton Extractor O-Ring per MIL-R-83248C. The springs are constructed from Chrome Silicon wirestock, a high tensile strength alloy ideally suited for high heat and high cyclic rate applications. The springs are heat treated, stress relieved, moly-plated, and most importantly, Cryogenic Processed post winding. While Cryogenic Processing typically extends the duty cycle of Chrome Silicon springs 3X – 7 X, these extractor springs have proven to surpass that multiplier. Unlike Music Wire or 17-7PH Stainless extractor springs which can require replacement at 2,500 to 5,000 round intervals for maximum reliability, this is likely to be the only extractor spring you’ll require for the life of the bolt! Numerous accounts have been recorded from customers with round counts in excess of 100,000 cycles on a single spring and O-ring with no noticeable degradation in performance. You’ll go through a number of barrels and extractors along the way to reaching that level, but the spring and O-rings can stay along for the ride.
Results may vary, but ADK Arms has spared no expense in our commitment to provide you the very best in long term performance and reliability of our products!
Friendly Reminder: Always check your head spacing.
- This item needs to be maintained with oil/lubricant to keep its finish and prevent corrosion.
- Never use damaged, bent, corroded, dirty, wet, or oiled ammunition.
- You should only use commercial grade ammunition in its original packaging which corresponds with the caliber that is imprinted on the gun.
- Do not use refurbished, reloaded, hand-loaded, or non-standard ammunition of a different caliber.