Are FLGR's legal in distinguished?

Are these considered "factory" parts or performance enhancing aftermarket? Just got a used one from Jon to weigh down a 38wc 1911 and think it would be nice in my irons pistols to bump the weight, I like heavy pistols and going from 52oz wadcutter to stock 1911 is a big difference.

They are allowed, 4.1.2 s) in the rule book

FLGR are permitted.   See "S)" at end. Referred to as FLRG

4.1.2 Approved Service Pistol Modifications A Service Pistol may have any of the following specific modifications or alterations: a) Barrel may have an integral bushing or threaded sleeve that is made of the same material as the barrel, that has an external diameter of 0.700” or less and that is not longer than 0.800” when measured from the muzzle. b) Extended or vented trigger. c) Trigger shoes and trigger stops, internal or external. d) Oversize or extended magazine release; magazine base pad. e) Higher front sight to accommodate the height of an adjustable rear sight. Colored sights are permitted; the use of fiber optics or light enhancing or tritium inserts in sights is permitted. f) A Picatinny rail below the barrel. g) Slides may be milled immediately in front of and behind the rear sight dovetail slot to aid in securely mounting adjustable rear sights; a cut may be made in the rear of the slide to allow for rear sight clearance. h) The fore strap, sides and rear of the grip may be checkered or stippled. i) Grip tape or textured non-slip adhesive tape may be applied to the grip. j) External finish may be blued, parkerized or bright. k) Gripping slots in the forward part of the slide. l) Holes, filled or unfilled, that are drilled in the slide to facilitate optical sight mounting are permitted. m) Internal modifications to improve functioning and accuracy (e.g., a special match barrel may be fitted). Modifications may not interfere with the proper functioning or safety devices of the firearm, except that a magazine safety may be disabled. n) Hammers of any configuration (combat-style, rounded, spur, etc.). o) Modified or beavertail grip safety. 37 p) Ambidextrous or extended safety. q) Extended slide stop. r) Accurail. s) Full-length recoil guide. t) Square trigger guard

Yup! Got em in my guns. Reference to rules already listed above.

Thanks guys.