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stripped lower
In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock. Stripping ratios are typically reduced to show the volume of waste removal required to extract one unit ton of ore, for example, 1.5:1 as opposed to 3:2.
When compared to surface mining, which requires overburden removal prior to ore extraction, underground mining operations tend to have lower stripping ratios due to increased selectivity.
All other factors being equal, mining at a higher stripping ratio is less profitable than mining at a lower stripping ratio because more waste must be moved (at a cost per unit volume) for an equivalent volume of revenue generating ore. If the ratio is too high given a particular price of ore and associated cost of mining then it may not be economical to conduct mining.
I have a new and unfired Knights Armament non-ambi stripped lower receiver I no longer need. It has never been fired, but it was partially built and mocked up with an upper receiver. This is not one of the blemished batches. It comes with the original box. I'm asking $500 FTF in the Portland...
Used FM Products 9mm Glock lower receiver.
Last round hold open was modified to work with Taccom Extreme Feed barrel.
$100
NO TRADES
NO SHIPPING
TRANSFER AT LUCKY SPORTING GOODS ($20 total transfer and BGC)
BUYER PAYS TRANSFER FEES ($20)
BUYER PAYS SELLER BEFORE 4473
Thanks for looking...
Aero precision stripped ambi lower - $200
Silencerco lower - $250
Noveske Gen 3 - PENDING
Transfer is a must. Prefer to meet king county area. Open to trades
No problems with it, just no need for it anymore and don’t want to part it up to sell as a complete lower or complete rifle.
Open to trade offers, but please message directly not in thread. Local transactions only - will not ship.
My Dad (a Marine Viet Nam Vet) was telling me how they would field strip and reassemble their rifles blindfolded or in the dark. I thought that would be a cool way to build an AR15. It didn't work out very well (see pics). The soul of this receiver is in firearm heaven but the corpse remains. It...
Like the title says, this is Brand New, ready to build into the gun of your dreams, these are really hard to come by, don’t let this one get away
looking for $275
Thanks to @dmmv for alerting me to this deal. Aero is running these M5 lowers for just under $115 shipped right now. If you have a new account there try using discount code AeroCS_21 and that may knock 10% off. It worked for me...
Limited run of 2000... :s0140:
https://palmettostatearmory.com/psa-ar-15-vatipants-15-stripped-lower-receiver-pre-order-ships-in-approximately-10-12-weeks.html
This is a new Palmetto State Armory M4E1 stripped lower. Never built or assembled- as new from PSA.
Property of U.S. GOVT markings.
$65 picked up at a FFL in Kitsap. Add $10 for shipping.
Sorry for the terrible photos. I tried to wipe my thumbprint off with a paper towel so the photos show...
Geissele stripped lower, new in box
pictures are from one that was opened, this one is still factory sealed.
This is not a blem, it’s perfect!
luna black color
$150 cash, firm and no trades. Transfer to be done somewhat locally or I can ship to an FFL who accepts from private party. Buyer...
New Anderson Manufacturing AR15 stripped lower receivers, $60 each. $10 background check. I have open trigger guard or closed trigger guard options. Your choice.
I also have Anderson AR-15 stripped upper receivers and other parts (LPK, buffer tube kits, stocks, etc.) available. Please PM me if...
Geissele stripped lower, Luna black, New in box!
This is not a blem
$275 cash, no trades and price is firm
Transfer is at buyer expense in Oregon city ($10 transfers)