The "right" H&K 91, and the right SA SAR 3 with the same set up, slim line fore end, para mags, tactical "snap" sling, and the rest being factory "stuff", can be a super sweet easy to carry 10lb. package loaded...
And the accuracy can't be beat...
I put 3 red painted 1 gallon milk jugs full of water on a desert hillside 600 yards away a few years back...drove back, turned around, looked, and couldn't see the jugs...
I spotted them, found the little red specks, and asked my bud to spot for me...
1st shot he calls "3 feet low" , and I'm on the 300 meter "wheel" rear sight...I move it up to 4...and aim a tad high, just over the top of the red speck..."boom" *poof*
"Gone, move left"....second target, same routine..."Boom" "Gone, move left"
Third target, "Boom", "Gone, nice shooting bud"...
These shots were made with a box stock SA SAR full stock rifle, shooting "Santa Barbara" Brazilian military ammo (I think it's 150 Gr., but I'm not sure about that...it may be 147), over the hood of a lifted Toyota truck, with a sandbag rest for my elbow...
The time was roughly 10 AM, 85'F, almost no heat mirage, no wind, and a friend with a spotting scope...
Did I do it, yes. Could I do it again, maybe. Was I just lucky that day...probably.
On H&K parts...I agree with Tom, the Clawmount with a tactical scope could set you back a grand...not for me, too many knives to buy.
The collapsible 91 stock...Gawd, what an uncomfortable POS! The lower tip is all that makes contact with your body, and that's the collar bone..."Ouch"
Fun guns...I miss them.