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builder set

In set theory and its applications to logic, mathematics, and computer science, set-builder notation is a mathematical notation for describing a set by enumerating its elements, or stating the properties that its members must satisfy.Defining sets by properties is also known as set comprehension, set abstraction or as defining a set's intension.

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Recent contents
  1. H

    Aero Highland Camo PRS Builder Set w/barrel

      1. For Sale
    • $1200
    • Sagle
    • Idaho
    Setup for 6.5 Grendel. Everything you need to build a complete rifle. Everything is new in box, except the barrel, which has seen 40rds on a different rifle. Only selling as a complete kit, please do not ask to separate. Includes: - Complete Builder Set in Highland camo (upper, lower, 15"...
  2. Y1NGER

    Aero Precision M4E1 Builder Set

      1. For Sale
    • $620
    • Cornelius
    • Oregon
    Up for sale is an Aero Precision M4E1 Builder Set cerakoted in topographic OD green. Brand new in the box, this set includes an upper/lower receiver set, and an SM15 15” handguard. More pictures available on request. Asking $640 OBO - not open to trading at this time.
  3. Tarcos

    Aero Precision M5 Builder Set W/ Handguard - Jurassic Hunter

      1. For Sale
      2. For Trade
    • $700
    • Milwaukie
    • Oregon
    I bought this a while ago then never did the build so it's gotta go Not Interested in Shipping Buyer Pays their transfer fees (If trading firearms) Meet at Adaptive Firing Solutions in Oregon City They charge $20 for the transfer I can meet you at a different FFL in the Portland Metro Area if...
  4. D

    ORW Receiver Set Build 16'' + 14.5'' barrel

      1. For Sale
    • $600
    • Hillsboro
    • Oregon
    Recently upgraded to a piston driven rifle so I am selling my first AR. Have about 800-1000 rounds through this over the last year. Runs great, just prefer a piston system now that I have a suppressor. $750 - Oregon Rifle works "reject" lower and upper receiver set - 16" 5.56 barrel with...
  5. jlynblackmore

    Aero dark mountain builder set

      1. For Sale
    • $500
    • Elmira
    • Oregon
    Aero precision dark mountain camo builder set This was built out then fired one mag through it, parts have been stripped off for a different build. Paid $600 asking $500 obo Two small chips in photos
  6. armjimen

    Oregon Rifleworks Complete Billet Receiver Set

      1. For Sale
    • $315
    • Hillsboro
    • Oregon
    Complete Oregon Rifleworks billet reciever set in black for sale. This is in excellent condition, Oregon-made and sells for $449. https://oregonrifleworks.com/shop/black-receiver-set/ Specs: Billet Machined 7075 – T6 Aluminum Construction Integrated Trigger Guard Flared Magazine Well...
  7. RCG77

    Aero Precision 1776 Betsy Ross M5 AR-10 Builder Set

      1. For Sale
    • $999
    • Hillsboro
    • Oregon
    Aero Precision 1776 Betsy Ross M5 AR-10 Builder Set -Betsy Ross 1776 Builder Set -20" 308 Aero Barrel -Odin Atlas 7 -Aero 308 BCG -Cmmg LPK -Anodized Blue Buffer Tube I have always meant to put this together and finish the build but haven’t had the time. Just needs a trigger, buffer &...
  8. M

    Aero precision chocolate chip set

      1. For Sale
    • $1200
    • Lakewood
    • Washington
    For sale out of Washington willing to travel open to offer manly looking for cash have about 500 rounds through it runs smooth and fast Build list Aero precision builder set chocolate chip cerekote by ely yerian design 11.5 inch 556 barrel Vg6 delta muzzle Aero lower parts kit minus...

  9. ORW Receiver Set w/ 16" Dracos Straightjacket Barrel

      1. For Sale
      2. For Trade
    • $750
    • Hillsboro
    • Oregon
    Selling my Oregon Rifleworks Receiver set. Hard to tell in the photos but it's cerakoted in their custom run of "urban grey". I can't upload more than one photo, so please reach out if you'd like more. I paired it with a 16" Draco's Straightjacket Barrel chambered in .223 Wylde(5.56 & .223...
  10. PDXElectrician

    Aero Precision M4E1 Builder Set

      1. For Sale
    • $400
    • Molalla
    • Oregon
    Aero Precision M4E1 Builder Set w/ 15" Atlas R-one MLOK handguard - Bronze Digiwash Stripped Upper, Stripped Lower, and Handguard Featuring a Bronze Digiwash finish applied by Weapon Works. This unique finish features contrasting shades of bronze and gold with a laser etched digital camouflage...
  11. D

    Aero Precision M4E1 Builder Set, Blown Deadline Half Tone Combat Gray Atlas S-One 15"

      1. For Sale
    • $750
    • Woodland
    • Washington
    Brand New M4E1 Aero Builder set. Blown Deadline Half Tone Combat Gray color, looks amazing. Handguard is a 15" Atlas S-One. It's been in my safe collecting dust for a long time, I have to make room for other projects. Unfortunately I can't sell it to anyone in Washington state since we have an...
  12. HighLine

    Consignment: F-1 Firearms UDR-15-3G Old Glory Builder Set

      1. For Sale
    • $1545
    • Newberg
    • Oregon
    Fresh on consignment Never Built F1 Old Glory Builder Set Skeletonized Billet Matched Receiver Set Scalloped top MIL-SPEC picatinny rail Oversized ejection port Oversized trigger guard 60° beveled magwell Enhanced takedown pins included and installed Custom Old Glory Cerakote $1545 +...
  13. ImNotV3ryNinja

    Psa AK 105 pistol 5.45x39

      1. For Sale
    • $900
    • Canby
    • Oregon
    5.45x39 Psa ak 105 with full plum furniture set and alg trigger. Has about 500 rounds through it and only problem I've had is it doesn't like the cheap plastic bulgarian mags, runs everything else though. Not pin and welded so it is still a pistol Includes two pmags, as well as extra surplus...
  14. jessygirl20150

    NIB multi cal. Aero Precision M4E1 Builder set, 9" Handguard, Midnight Marshland Builder set.

      1. For Sale
      2. For Trade
    • $520
    • Wilsonville
    • Oregon
    New in box: multi cal. Aero Precision M4E1 Builder set, 9" Handguard, Midnight Marshland Cerakote from Aero. Please see list below for Aero Precision parts I have for sale for this build. $520 Trade: +/- cash on either end. - High end AK47 in 7.62x39 / 51 - ACOG TA02-D-100393 ( LED...
  15. jessygirl20150

    NIB multi cal. Aero Precision M4E1 Builder set, 9" S-one Handguard, Midnight Marshland Cerakote from Aero $520

      1. For Sale
      2. For Trade
    • $520
    • Wilsonville
    • Oregon
    NIB multi cal. Aero Precision M4E1 Builder set, 9" Handguard, Midnight Marshland Cerakote from Aero. Please see list below for Aero Precision parts I have for sale for this build. $520 Trades: +/- cash either side: - Henry Big Boy X blued/black in .357 - ACOG 4X32 LED - Trijicon RMR Type 2...
  16. jessygirl20150

    NIB - Aero Precision M4E1 Builder set with all Aero Precision parts to finish, Midnight Marshland Camo.

      1. For Sale
      2. For Trade
    • $1400
    • Wilsonville
    • Oregon
    Aero Precision M4E1 Midnight Marshland Builder set 9” S-one slim line handguard Aero Pro Nitride BCG .223/5.56 Aero Breach charging handle Aero LPK Aero buffetube kit 10.5” Odin works ultra lite .223 wylde Geissle SSA-E trigger Noveske Flaming pig Magpul pistol grip SBA3 brace $1400 Trades...
  17. randymarsh

    Aero M4E1 Builder set “Midnight Marshlands” cerakote

      1. For Sale
    • $350
    • PORTLAND
    • Oregon
    9” Atlas S-one handguard. Prefer transfer in PDX. Will drive into Washington to meet you only between 10am-2pm $350/obo First come, first served. Will not hold. Thank you!
  18. randymarsh

    Aero Builder Set

      1. For Sale
    • $300
    • PORTLAND
    • Oregon
    Bronze digiwash. 15” handguard $300 Buyer handles transfer in Portland
  19. kasuk

    SOTA Arms Billet AR-15 receiver set

      1. For Sale
    • $175
    • Redmond
    • Washington
    Trade my receiver set for your red dot set up - SOTA Arms Billet AR-15 receiver set 7005 billet aluminum w/ integrated trigger guard. - Strike Industries Ejection port cover - Seekin Precision oversized bolt catch release Looking to trade for a red dot. - Holosun 403 or 503 - Primary...
  20. Tacompton173

    Anodized Burnt Red Aero Precision Builder Set (lower complete)

      1. For Sale
      2. For Trade
    • $300
    • Tacoma
    • Washington
    Early Aero Precision builder set done as a factory sample in Burnt Red anodized. Could be a great excuse to build a gun for the wife. Note the small ding on the magwell. Otherwise the set is perfect. Lower is complete. Will come with both Black and Red Handguards. Red Handguard is a little...
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