APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
$206.99
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
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Description
Description
APF SP4-coated BCGs Machined to Military Specifications & Made in the USA
Alex Pro Firearms (APF) is proud to introduce BCGs featuring SP4 a hybrid DLC (Diamond Like Carbon) coating that is the result of over a year in development. SP4 combines high hardness (2500-3500 HV) with ductility to remain tough without exhibiting brittleness vs common PVD/DLC type thin film coatings. SP4 reduces friction and improves wear resistance for metal components which provides a longer life span and requires minimal maintenance with little to no lubrication. It has been tested to -44F in the mountains of Alaska and has been tested in both Iraq and Afghanistan with no lubrication which is a huge advantage in desert environments and extreme cold. SP4 has passed the ASTM 85 (Annex 1) Salt Fog test and provides the best hardness/lowest friction co-efficient while maintaining the ability to “move” with the metal it is protecting. Includes a hand polished bolt carrier with a chrome lined bore and staked gas key bolt with gas rings firing pin cam pin and firing pin retaining pin.
Longer Product Lifespan (BCG) High Hardness High Wear Resistance Extremely High Lubricity
BOLT: Carptener 158 Shot Peened Heat Treated SP4 Coating
CARRIER: SAE 8620 Heat Treated SP4 Coating Full Auto
EXTRACTOR: CNC machined Shot Peened Heat Treated SP4 Coating
FIRING PIN: Swiss machined Heat Treated Precision ground SP4 Coating
GAS KEY: CNC machined Heat Treated Chrome Lined Torqued and Staked to Carrier Mil Spec. SP4 Coating
CAM PIN: Swiss machined Heat Treated SP4 Coating
Delivery Info
- Standard and Express delivery services are available for all items.
- Shipping costs are calculated at the checkout page (after delivery option & destination confirmation).
- Tracking is available for all delivery options.
- Items are delivered during standard business hours.
Reviews (9)
9 reviews for APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
Only logged in customers who have purchased this product may leave a review.
Derrick (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
Fast shipping, and the product works perfectly. Would buy again.
Carver (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
I’m so pleased with this product. TCM Defense Co. provided excellent customer service from start to finish.
Brock (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
I love this product! TCM Defense Co. made sure I was satisfied with my order and responded quickly to my questions.
Stella (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
Highly recommend this product. The fit was perfect, and it works great.
Tatum (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
Great experience with TCM Defense Co. – fast shipping and responsive customer service.
Raven (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
I received my order on time, and the product works exactly as expected. TCM Defense Co. is the best.
Leroy (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
The customer service was amazing, and the product quality is outstanding. Will be purchasing from TCM Defense Co. again!
Lucy (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
Item arrived on time and in great condition. Will definitely shop with TCM Defense Co. again!
Corinne (verified owner) –
APF Armory M16 Bolt Carrier Group SP4 5.56/223/300 BLK Blue Steel
The product works perfectly, and the shipping was fast. Would highly recommend.