March 19th, 2012

New AR Buttstock Adapter for Eliseo Tubegun Chassis Kits

Eliseo CSS Tubegun AR AdapterHere’s good news for AR fans who want to add an ultra-accurate Tubegun to their rifle collection. Now you can use many popular AR-specific buttstocks with Eliseo CSS Tubegun Chassis Kits. Gary Elesio has crafted a new adapter that fits between the Tubegun’s action sleeve and the buttstock, allowing the use of the many AR buttstocks which fit an AR buffer tube. The new adapter, priced at $60.00, is a simple, no-gunsmithing installation.

The buffer tube (with buffer removed) simply screws into the female-threaded CSS adapter unit, and then the AR buttstock is secured to the buffer tube (either by set-screws or locking collars, depending on the design). Finally, the whole assembly (AR buttstock plus adapter) slides into the rear of the Tubegun’s action sleeve, where it is secured by a tensioning screw.

Eliseo CSS Tubegun AR Adapter

Gary Eliseo of (CSS) explains: “I’ve had lots of demand to support AR buttstocks on my chassis systems. The Lightweight Hunter Chassis will now be supplied with an adapter for mounting an AR buffer tube. This adapter, with an anodized finish, will also be available as an option for other CSS Chassis Kits. The whole system is reasonably light with an AR buttstock installed. With an ACE skeleton-style AR stock (shown in photos) the whole Tubegun weighs right at eight (8) pounds. That was with action in place and a 24″ sporter-weight barrel, but without optics. Some heavy-barrel ARs weigh more than that.” NOTE: The Chassis in the photos is right off Gary’s machines, so it is bare metal. As delivered, CSS Chassis Kits come with an Anodized, Cerakote, or Powder-coat finish, according to buyer preference.

Eliseo CSS Tubegun AR Adapter

Eliseo’s Light Weight Hunter (photo below) will now be delivered with the AR adapter, rather than a CSS-made buttstock. This gives the chassis purchaser the ability to choose from a variety of third-party buttstock designs, including collapsible stocks. The good news is the price of the CSS Light Hunter Chassis with Cerakote finish will be reduced $90.00 to $685.00. That’s a great deal when you consider most guys can use a buttstock they already acquired for their AR(s). If you have any questions about Gary’s new buttstock adapter, you can post in this Forum Thread, and Gary can give you an answer. Alternatively, email your questions to: [at]

Eliseo CSS Tubegun Light Weight Hunter

Shown above is Gary Eliseo’s Light Weight Hunter with original CSS-made tubular buttstock. From now on, Light Weight Hunter Chassis Kits will be supplied with an AR buttstock adapter (and no buttstock), so the purchaser can select his preferred buttstock design from a variety of third-party options. This change allowed CSS to reduce the Light Weight Hunter Chassis price to $685.00 (including adapter).

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