Centurion Arms
E4 ETB Tapered AR-15 Bolt (5.56/300BLK)
Designed to make the AR platform more reliable and increase longevity with a lifetime guarantee against bolt breakages. Designed Specifically for Centurion Arms “T” Marked Barrels and Knights Armament E3 Extensions.
The Centurion Arms E4/ETB Bolt features a new body profile that creates a larger radius between the bolt lugs and the body that allows the pressure to be spread over a larger area reducing stress points which leads to lug failures. They have also added dual ejectors that help rotate the brass off the bolt face faster to ensure more reliable ejection in rifles while running suppressed or going back and forth between suppressed/unsuppressed. This also helps with platforms that are considered to be “over-gassed”.
E4 bolts use standard gas rings for logistical commonality and also use standard extractors with black inserts and either Colt OEM extractor springs or upgraded 5 coil chrome silica stress relieved springs for ultimate reliability.
E4 bolts do not require a proprietary firing pin or cam pin so please feel free to mix and match with your favorite standard selections as well.
What’s Included
1x Centurion Arms E4 ETB AR-15 Bolt (5.56/300BLK)
Specifications
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