Abstract: Disclosed herein is a modular, replacement chassis stock system for an existing firearm's operating mechanism possessing a simple design and incorporating durable, commercially available components. The system comprises a chassis assembly with up to three integral mounting rails, a top rail, a replacement operating rod guide, a telescoping buttstock assembly, and a buttstock/grip mount assembly. The present invention may be used to replace the standard stock of an M-14 rifle (or copies thereof, such as the Springfield Armory M1A) such that the barrel is held in perfect alignment with up to five Mil Std 1913 pattern mounting rails. The telescoping buttstock assembly is adjustable in length via the use of a thumb lever release and includes an adjustable cheek-rest, an optionally adjustable buttpad, and a pistol grip. Auxiliary devices may be attached to the chassis stock system via the buttstock/grip mount assembly located above the pistol grip.

Abstract: A buttstock assembly has a buttstock that holds a plurality of removable and sealable tubes. The buttstock has a butt plate, an elongated body extending perpendicularly away from the butt plate, and a structural web coupled to the butt plate and elongated body. The elongated body defines a central cavity and an elongated cavity on either side thereof. Each tube is sealable and forms a sliding fit with one elongated cavity.

Abstract: Improved detergent compositions are provided containing a modified rosin ester and at least one other surfactant selected from the group consisting of anionic, nonionic, cationic and amphoteric surfactants.

Abstract: Novel modified rosin esters and a method of preparing these novel compounds are described. The novel compounds are useful in surfactant compositions.