Was impossible to shoot very long because it got too hot to hold onto. I often wondered if the German Army issued asbestos oven mitts with these rifles.
With the bipod/heat sink removed, and better options than the metal cook your hand grill installed (the basic fiberglass/composite frontends work wonders), I've found that the FAL cooks a little less than the G3.
G3 is much easier to mount a scope to with the factory claw type mounting system. The FAL system is sort of odd, or at least the system that was available at the time I owned the G1 was sort of odd, and had several small screws that had to be snugged down to assure the top cover didn't shift.
Newer DSA mounts still have the screws but they're a hell of a lot more solid than the old $20 FAC ones. That and once they're on you just clean around them, cleaning ends up about on par with the 91.
Then again, I hate cleaning the 91 more - carbon buildup and whatnot gets stupid. Of course, in shooting both with a can, they both are exercises in cleaning ugliness.
Claw mount gives limited scope height options, but the B&T rail mounts are actually workable (and survived the 51, which I can't say about the knockoffs where the rear scope base locking point chewed through the aluminum).
Both guns are stupidly abusive on scopes IME, I used either to test new mid-priced non-Aimpoint red dots that they wanted to sell in the store here. Very, very few lasted 100 rounds.
Works every time, pretty much the same. Some see the adjustable gas setting to be a "feature," and that is as may be, but I think it is one more thing to go wrong.
These days it's a tossup. In the era of $20 battlepacks, it was cheaper to adjust the gas than buy the good HK recoil buffer to get the 91s down to where the FAL is when adjusted right.
That and on the ones I've built, the adjustments have been extremely minor over what they came equipped on, at least on the unissued STG kits.
I've gone more for the HK pattern guns in recent years, partly because I can't escape viewing the FAL from the lens of what they used to cost to build vs what they sell for now, that and there's only so many FALs a growing boy needs.
