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buffer tube

A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another, with the aim of the signal source being unaffected by ("buffered from") whatever currents (or voltages, for a current buffer) that the load may produce. Two main types of buffer exist: the voltage buffer and the current buffer.

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Recent contents
  1. doomsday

    Build Thread  Buffer tube

    I have a quick question. Is there a difference between a AR 15 PISTOL buffer tube and a AR 15 rifle buffer tube. Will a AR 15 rifle buffer tube and spring work in a AR 15 pistol ?? Thanks
  2. robert 81

    WTS/WTT OR  Kak pistol buffer tube

    Came in the mail yesterday did my measurements can’t use it $40 or trade for carbine buffer tube with buffer spring end plate and castle nut Tomorrow listing will be removed and I will send it back to the company if nobody wants it thank you for looking:s0003:
  3. Liberty19

    WTS OR  BCM buffer tube w/ castle nut and endplate (Non QD)

    $25 Assembled, never fired Pictured on this rifle.
  4. G

    WTS OR  Anderson lower Stag lpk Smos buffer tube

    All new Anderson lower with stag lpk, Smos buffer tube and waffle stock no buffer or spring. $100 plus ffl fee. Text 9715067873
  5. FireArm

    WTS/WTT OR  CZ Scorpion mags and AR buffer tube adapter

    CLOSED
  6. FireArm

    WTS/WTT OR  CZ Scorpion mags and AR buffer tube adapter

    CLOSED
  7. BlindedByScience

    WTS WA  LUTH-AR - AR-308 RIFLE BUFFER TUBE ASSEMBLY

    I accidently bought two of these for my AR10 build. Still have one in the bag. AR10 buffer, main spring, and buffer tube. Brand new, still in the bag. I paid $61.00 plus shipping from Brownell's, how about $50.00 in Vancouver / PDX....?? LUTH-AR LLC AR-308 RIFLE BUFFER TUBE ASSEMBLY | Brownells
  8. BMRedBeard

    WTS/WTT OR  PSA mil-spec buffer tube

    For sale is a new PSA mil-spec 6-position buffer tube. Tube only, no buffer or spring. SOLD
  9. Liberty19

    WTS OR  BCM MOD 0 stock and buffer tube assembly w/KAC SR-15 carbine buffer w/spikes pistol grip

    Trade for 5.56 ammo Stock, buffer tube, spring, castle nut and endplate are BCM. Spikes pistol grip KAC buffer-SOLD!!! All parts are in excellent condition. PRICE DROP!! $50
  10. Liberty19

    WTS OR  BCM buffer tube castle nut and endplate

    Reduced $20
  11. Jcon268

    WTT OR  Rifle buffer tube for pistol buffer tube

    My ignorance brings me here today after realizing that I purchased a rifle buffer tube for my pistol build and not the correct one. Beyond returning, so here I am. UTG tube brand new out of package. Want to attach a brace and so need the appropriate tube. No buffer or spring swap, just the...
  12. Jonathan

    WTS OR  AR Pistol Buffer Tube and Spring

    New unused AR 15 Pistol buffer tube and spring. Asking $40 OBO. Cash only, no trades. 971-246-6347. In Clackamas
  13. R

    WTB OR  Milspec buffer tube kit

    I bought a milspec stock by accident when I have a commercial tube so I am in need of a milspec buffer tube kit to replace it lmk what you got
  14. JohnH

    WTS OR  Shockwave Pistol Blade and Buffer Tube

    Installed once and removed. Like new as seen in pictures blade and KAK Shockwave Buffer tube. Both pieces for $50
  15. Liberty19

    WTS/WTT OR  BCM grey stock grip trigger guard and bcm QD end plate w/LMT buffer tube Spikes T2 buffer &spring

    $130 or Partial trade for black BCM grip and triggerguard + $100
  16. faron

    Pistol buffer tube threads too short to engage retaining pin/my fix

    Hopefully others will find this helpful if they run into the same issue. So I recently just finished my first ar pistol in 9mm. I've always loved and wanted the mp5 but they, and their 9mm variants are usually far too expensive for my taste, and the .22s, though fun, just don't have the umph...
  17. aljames

    WTS OR  KAK SB-15 buffer tube kit

    SOLDLike new, I bought it 2nd hand about a year ago [here I believe] and never installed. Comes with spring, carbine buffer, new castle nut and new std end plate. SOLD$40 shipped via USPS priority insured with tracking. USPS money orders or F&F paypal or add 3%. Cross posted on other forums...
  18. S

    WTS OR  Mft stock/grip and buffer tube

    I have a like new mft grip and stock and comes with milspec buffertube. $60
  19. Joe Link

    Differences between AR15 receiver extensions (buffer tubes)?

    I need to pick up a couple lower receiver extension kits for the Northwest Firearms lowers I'm building and I'm trying to figure out if there's a right way and a wrong way to go in terms of quality or function. Any input? :)
  20. Nicholi2789

    WTS/WTT OR  MBUS front and rear, CTR stock & buffer assembly more.

    Hey guys, got some misc ar parts for sale. Never ended up using them. Would like cash, but would also consider trading for reloading supplies such as powder and bullets. (223, 9mm, 308 stuff mostly). First is a set of magpul gen 2 MBUS sights. Brand new condition. Decided to go FDE. $50 Next...
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