But, I would need the front sight base to accommodate this type of bayonet. The split open rear ring on the bayonet appears to slide over the front of the gas block - or on the barrel.

These bayonets have an open back split ring, and they appear to lock onto the front sight base via some fingers below the front sight base. I have seen early Russian bayonets that do not require the gas block bayonet lug. And, then I have to deal with the gas block and the bayonet lug issue. I could thread my barrel according to Messiah's instructions - but, without a retainer pin, or wielding - the muzzle break could back out and off the barrel. I beleive my rifle has been, to use the correct vernacular - been neutered. However, the gas block has had the bayonet lug ground off, and the front sight base has no hole to accommodate the retainer pin and spring used to lock a muzzle break. The receiver is milled and the stampings show it came from factory 386. I have a Norinco MAK 90 that I've made 922 compliant. He mentioned correctly that not all barrels are threaded, and not all front sight bases have this retainer pin, or the hole for the retainer pin. Jones suggest a kit for processing the threads, and also mentioned the retainer pin that sits in the front sight base, and is used to lock the muzzle break from unthreading. On January 2008 - 'Messiah Jones offered a really good tutorial on threading his Saiga barrel.

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