Rainier Arms Thunder Bolt™ BCG HPT/MPI/Shot Peened AR15 M16 Description: The Thunder Bolt™ BCG was created to meet and exceed all Mil Spec standards. Giving you the confidence to run your weapon long and hard at 110%. You will never have to worry about your BCG being the weakest link in your weapon. The bolts are HPT & MPI tested & Marked to give you ultimate confidence in your weapon system. Carrier: - SAE 8620
- Heat Treated
- Manganese Phosphate with Hard Chrome Lined Bore
Bolt: - Carpenter A-158
- Shot Peened
- Heat Treated
- Manganese Phosphate Coating
Extractor: - Machined from bar
- Shot Peened
- Heat Treated
- Maganese Phosphate Coating
Extractor Spring: - Chrome Silicone for Longer Life
- Black Insert as per current Mil-Spec
- “O” Ring is high temp resistant dark brown
Extractor Retaining Pin: - Precision Machined
- Precision ground to diameter
- Precision ground to length
- Heat Treated
Firing Pin: - Machined and then precision ground for accuracy
- Heat Treated
- Hard Chrome Plated
Gas Key Bolt: - Precision manufactured in house with extra deep knurling
- Grade 8
- 1200 degree locking patch is factory applied to threads to help insure long lasting tightness
Gas key: - Hard Chrome lined gas tube as per Mil-Spec
- Bolts installed to proper torque
- Staking on both sides of both bolts
Cam Pin: - Precision machined
- Heat Treated
- Maganese Phosphate Coating
Firing Pin Retaining Pin: - Precision bent
- Precision cut to length
- Heat Treated
Gas Rings: - Stainless Steel per Mil-Spec
Ejector: - Precision machined
- Heat Treated
Ejector Spring: - Chrome Silicone
- Precision ground ends
Ejector Retaining Pin: - Precision cut to length
- Black Zinc Coating
Limited Lifetime Warranty We are so confident in our Rainier Arms Thunder Bolt BCG we offer them with a limited lifetime warranty. So if at anytime your Rainier Arms Thunder Bolt BCG breaks on your during normal use(Intentional abuse & Gas Key wear not included) we will replace it. *We have “toned down” the logos due to customer response and lowered the price for your benefit. |