Lynndon 🇺🇸

Firearm development, Design, Russian weapon SME, and consultant. US Army Infantry veteran. The Firearm Blog writer.

[Lynndon 🇺🇸 @lynndon87]

SIG M250 out of battery detonation. This is attributed to operator error, as during the clearing process, the gunner holding the charging handle to the rear was not far enough to lock on the sear. The handle slipped, a belt in the tray, and a live round stuck in the barrel.

[Lynndon 🇺🇸 @lynndon87]

M240B cracked steel receiver. This occurred during suppressor development. The firing schedule was well outside the TM, with a 600-round continuous burst exceeding the prescribed limits, which may have contributed to the hydraulic buffer failure.

https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

Even the steel receiver Bravo can fail under enough abuse and neglect. The hydraulic buffer assembly, with its poor design, unscrewed back into the stock, as the plunger was flush with the backplate.

https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

Hard to believe, but we sometimes receive new M4A1 barrels. These are old Colt M4s upgraded to the M4A1 standard in 2018. One of the upgrades includes a SOCOM 14.5 inch heavy barrel.

https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

M240 feed tray cover with an M249 feed lever return spring. A maintainer down the line used it possibly in a pinch, and it worked, though it wasn't the right one, so it was swapped out for the correct spring.

https://t.co/aMH3Z59lIo

[Lynndon 🇺🇸 @lynndon87]

Serbian M84s.

https://t.co/aMH3Z59lIo

[Lynndon 🇺🇸 @lynndon87]

FN M249 op rod assemblies, showing two attachment methods for the operating rod. Both versions are FN cage code marked, the older design is welded, whereas the newer design is threaded and pinned. I have only seen the welded versions fail, with fractures occurring at the welds.

[Lynndon 🇺🇸 @lynndon87]

Fullauto FN SCAR BCG failures.

https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

Zastava M84 Ceca

[Lynndon 🇺🇸 @lynndon87]

https://t.co/rBwsQyI9Tp

[Lynndon 🇺🇸 @lynndon87]

A little too rough?

[Lynndon 🇺🇸 @lynndon87]

My longtime friend @VladimirOnokoy’s new book, “From Balkans to Babylon.” It covers the history of the Zastava M70 AKs and the Iraqi Tabuk rifle.

I also contributed a tiny bit by sharing my thoughts on their AKs and by helping arrange our factory tour. https://t.co/iMjG50Qj1j

[Lynndon 🇺🇸 @lynndon87]

The URG-I suffered a bolt failure, resulting in sheared locking lugs. This is definitely NOT a new issue, but reveals the design weaknesses around the extractor.

[Lynndon 🇺🇸 @lynndon87]

https://t.co/W8CQoMAxyj

[Lynndon 🇺🇸 @lynndon87]

Reading through the RPL-20 bottom feeding LMG patent focuses on the optic and enabler mounting, and prioritizes reduced dispersion and enhanced controllability.

https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

@realplaya405 The AK days are numbered, so yes, it may be more likely a polymer upper and lower receiver with the AM-17 or the SVCh.

[Lynndon 🇺🇸 @lynndon87]

Kalashnikov Concern AK-203 features a tighter bore, a slower twist rate, and a taper step in the chamber throat. The reported accuracy improved from roughly 3-5 MOA (AK-103) to 2-3 MOA, which is roughly a 33-40% increase in practical accuracy.
https://t.co/aMH3Z59TxW

[Lynndon 🇺🇸 @lynndon87]

@amerpipedream This is from my last trip there.

[Lynndon 🇺🇸 @lynndon87]

https://t.co/hTv8J7bcyV

[Lynndon 🇺🇸 @lynndon87]

@amerpipedream Check out my article on it.

https://t.co/yrdXJ8sVGT.