Help decide how to upgrade this old FSB Sabre Defence upper

[maximus83]

Mainly thinking of the scenario of bipod use, and the potential impact of shifting POA/POI if a given type of rail has a tendency to be more 'flexy'. Again I haven't experienced that with my two Mlok rifles so far, but see the issue discussed a lot.

[Disciple]

Mainly thinking of the scenario of bipod use, and the potential impact of shifting POA/POI if a given type of rail has a tendency to be more 'flexy'. Again I haven't experienced that with my two Mlok rifles so far, but see the issue discussed a lot.

Doesn't having the front sight affixed to the barrel avoid that problem?

[grizzman]

If it's not broken, and you're only able to drop a few ounces, then it's completely not worth the effort or cost.

I'd keep it as is, shoot it like I stole it, and replace it when necessary. Another option is to get an upper assembly you want now, and keep the Sabre upper as a spare, or EOTWAWKI upper.

I plan to pick up a Centurion Carbine Cut-Out rail for a Colt upper. I almost never hear bad things about Centurion rails. I've got 3 of them, and have never had a complaint.

[maximus83]

If it's not broken, and you're only able to drop a few ounces, then it's completely not worth the effort or cost.

I'd keep it as is, shoot it like I stole it, and replace it when necessary. Another option is to get an upper assembly you want now, and keep the Sabre upper as a spare, or EOTWAWKI upper.

Yep, makes the most sense after looking at all the options, small-ish impact on weight, and cost. Ordered a Centurion CM4/LW upper with the Mlok rail, that's what I really wanted anyway. Gonna keep this upper as-is for backup and occasional KISS training with irons.

[georgeib]

Yep, makes the most sense after looking at all the options, small-ish impact on weight, and cost. Ordered a Centurion CM4/LW upper with the Mlok rail, that's what I really wanted anyway. Gonna keep this upper as-is for backup and occasional KISS training with irons.

This is the way.

[1986s4]

Yep, makes the most sense after looking at all the options, small-ish impact on weight, and cost. Ordered a Centurion CM4/LW upper with the Mlok rail, that's what I really wanted anyway. Gonna keep this upper as-is for backup and occasional KISS training with irons.

I have an upper built with a Centurion SOCOM profile carbine 14.5 barrel and their carbine cut out quad rail. I've never weighed it but it feels heavy even without optics. Currently all it wears is a Scalarworks rear iron. I do prefer a lighter set up so it waits as a back up.