Videos tagged with Trunnion Wear

This video details the results of a 4,000-round test on a Palmetto State Armory GF3 rifle, including exposure to swamp conditions. The rifle experienced one notable malfunction where a round failed to fire due to a light primer strike, later firing when reloaded. A significant finding was the loss of the firing pin retaining pin after 4,000 rounds, though the firing pin itself remained in place. The video also covers essential post-mud cleaning procedures to prevent catastrophic failures.

This video debriefs a 5000-round test of a VSKA AK47, with the instructor admitting he was wrong about the S7 trunnion material. Despite extensive use, the rifle showed minimal wear on critical components like the bolt carrier, trunnions, and hammer. Accuracy remained consistent, and no parts breakage occurred, leading to a positive assessment of the rifle's durability.

This video debriefs the VSKA rifle after approximately 1500 rounds. The presenter details wear patterns on the bolt, trunnion, carrier, and hammer, noting surprising polishing on locking lugs but chewing on the bolt face. A Dykem test indicates a rebalancing of stress towards the primary locking lug. Three malfunctions are discussed: a hammer follow, a double feed, and a slam fire, with the latter being a point of concern for VSKA rifles.

This video from Palmetto State Armory demonstrates the typical wear patterns expected on an AK-47's bolt and trunnion after firing approximately 1000 rounds. It highlights that minor wear and polishing on the bolt lugs and trunnion are normal during the break-in process and do not indicate a compromised rifle. The process involves using headspace gauges to track changes as rounds are fired.

This guide details a method for testing AK-pattern rifle bolt and trunnion lug wear using DyKem layout fluid. By applying DyKem to critical locking surfaces and cycling the action, users can visualize wear patterns. This technique helps identify potential issues like uneven force distribution between primary and secondary locking lugs, which can indicate manufacturing or assembly problems. The process involves careful application, dry cycling, live-fire testing, and analysis of the resulting wear marks to assess the firearm's mechanical health.

This review of the Riley Defense RAK 47 AK-47 by AK Operators Union highlights significant reliability issues and rapid wear. The rifle experienced multiple malfunctions, including failures to feed, within the first 300 rounds. Expert analysis points to a deformed bolt carrier tail and advanced field gauge readings as critical failures, making it unsuitable for reliable operation.

This video details the post-1000 round inspection of a DDI Hammer Forged AK47S, focusing on the critical failure of the original extractor. The presenter demonstrates the process of replacing the extractor and bolt, and crucially, performs a headspacing test with new DDI bolts to verify their 'drop-in' claim. The inspection reveals wear on the trunnion and bolt carrier, but the new extractor and bolts appear to be holding up well, with headspacing confirmed as correct on new components.